package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;

/**
 * @Author : Jungle
 * @Description :
 */
@Controller
public class CartController {
    @Autowired
    private CartService cartService;

    /**
     * 当前用户的购物项
     * @return
     */
    @ResponseBody
    @GetMapping("/currentUserCartItems")
    public List<CartItem> getCurrentUserCartItem() {
        List<CartItem> items = cartService.getUserCartItems();
        return items;
    }

    /**
     * 删除购物项
     *
     * @param skuId
     * @return
     */
    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }


    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {

        cartService.changeItemCount(skuId, num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 检查是否选中，保存到redis中
     *
     * @param skuId
     * @param check
     * @return
     */
    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                            @RequestParam("check") Integer check) {

        cartService.checkItem(skuId, check);
        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 浏览器有一个cookie; user-key;标识用户身份，一个月后过期;
     * 如果第一次使用jd的购物车功能,都会给一个临时的用户身份;
     * 浏览器以后保存、每次访间都会带上这个cookie;
     * <p>
     * 登录：session有
     * 没登录：按照cookie里面的user-key来做
     * 第一次：如果没有临时用户，帮忙创建一个临时用户
     */

    @GetMapping("/cart.html")
    public String cartListPage(Model model) {
        //1、快速得到用户信息，id,user-key
        //UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
        //System.out.println(userInfoTo);
        Cart cart = cartService.getCart();
        model.addAttribute("cart", cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     *
     * @return ra.addFlashAttribute()  将数据放在session中，可以在页面取出，只能用一次
     * ra.addAttribute("skuId", skuId);  将数据放在url后面拼接
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes ra) {
        cartService.addToCart(skuId, num);
        //model.addAttribute("skuId", skuId);
        //http://cart.gulimall.com/addToCartSuccess.html?skuId=8  拼接属性
        ra.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 防止购物车添加成功多次添加
     * 跳转到成功页面
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        //重定向到成功页面，再次查询购物车数据即可
        CartItem item = cartService.getCartItem(skuId);
        model.addAttribute("item", item);
        return "success";
    }
}
